8a-2a(a+1)^2进行因式分解

问题描述:

8a-2a(a+1)^2进行因式分解

8a-2a(a+1)²=2a[4-(a+1)²]
=2a(2-a-1)(2+a+1)
=-2a(a-1)(a+3)

8a-2a(a^2+2a+1)
=8a-2a^3-4a^2-2a
=-2a^3-4a^2+6a
=-2a(a^2+2a-3)
=-2a(a+3)(a-1)